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CVE-2026-109998— Mang Board <= 2.4.3 - Unauthenticated Stored Cross-Site Scripting via 'content' Parameter via content_reply AJAX

Quick assessment

Affected
kitae-park Mang Board
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Mang Board 插件在所有 2.4.3 及之前的版本中，因输入清洗和输出转义不足，存在通过 参数触发的存储型跨站脚本（Stored XSS）漏洞。该漏洞允许未认证的攻击者在页面中注入任意 Web 脚本；一旦用户访问被注入的页面，这些脚本便会执行。该漏洞可被利用，原因在于： 端点无需认证即可公开访问；在 模式下未强制进行 nonce 验证；且 返回的响应头为 ，导致浏览器将 JSON 响应体中嵌入的注入标签作为 HTML 执行。

CVSS 7.2 · High EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
kitae-park Mang Board ≤ 2.4.3 affected
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I. Basic Information for CVE-2026-109998

Vulnerability Information
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Vulnerability Title
Mang Board <= 2.4.3 - Unauthenticated Stored Cross-Site Scripting via 'content' Parameter via content_reply AJAX
Source: CVE Program / CVE List V5
Vulnerability Description
The Mang Board plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'content' parameter in all versions up to, and including, 2.4.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is exploitable because the wp_ajax_nopriv_mb_template endpoint is publicly accessible without authentication, nonce verification is not enforced for the content_reply mode, and admin-ajax.php responds with Content-Type: text/html, causing browsers to execute injected tags embedded in the JSON response body.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
kitae-park Mang Board 0 ~ 2.4.3 -

II. Public POCs for CVE-2026-109998

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III. Intelligence Information for CVE-2026-109998

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Patches & Fixes for CVE-2026-109998 (1)

Vendor Advisories for CVE-2026-109998 (1)

Vendor Pages for CVE-2026-109998 (2)

Other References for CVE-2026-109998 (1)

Same Patch Batch · kitae-park · 2026-10-16 · 3 CVEs total

CVE-2026-109219 9.8 CRITICAL Mang Board <= 2.4.4 - Unauthenticated Arbitrary File Upload via 'image_path' Parameter
CVE-2026-109512 6.4 MEDIUM Mang Board <= 2.4.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'content

IV. Related Vulnerabilities

Same product: Mang Board
Same vendor: kitae-park
Same weakness: CWE-79

V. Comments for CVE-2026-109998

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